题目

下面是某校8年级1班50名学生的课余活动调查统计表。请根据表格内容，用英语写一篇60词左右的文章。文章开头已给出，不计人总词数。ActivitiesEvery dayTwice a weekFour times a weekWatch TV301010Have sports52025Do homework5000 Here are the results of the after-class activity survey in Class 1, Grade 答案：Here are the results of the after class activity survey in Class 1, Grade 8. Most students watch TV every day. Some watch TV twice a week. Some watch four times a week. Only five students have sports every day. 20 students have sports twice a week. Half of students have sports four times a week. All the students do homework every day. No students do homework twice or four times a week.一块花岗岩石料质量为31.8t、密度为2.65×103kg/m3，立在用砖砌成的长4m、宽2m、高0.5m的水平基座上（如图13所示），石料与基座的接触面积为2.12m2．已知砖的密度为2.05×103kg/m3，基座砖缝中水泥砂浆的密度与砖的密度相同．（g取10N/kg）．求：（1）花岗岩石料的体积； （2）石料对基座的压强．